I need help with this!!!! PLEASE!!!!!!!!
5. If TriangleADC is the image of TriangleAEB, which is the proper term for point A?
[IMG]http://i57.tinypic.com/2r6lf9z.png[/IMG]
My answer is (A)
center of dilation
contraction point
pre-image point
scale factor
A segment with endpoints (2, –1) and (4, 2) is dilated to the image segment with endpoints (4, –2) and (8, 4). What is the scale factor for the dilation? (Points : 5)
2

4

6

8

Question

I need help with this!!!! PLEASE!!!!!!!! 
5. If TriangleADC  is the image of TriangleAEB, which is the proper term for point A?
[IMG]http://i57.tinypic.com/2r6lf9z.png[/IMG]
My answer is (A) 
    center of dilation
       contraction point
       pre-image point
       scale factor
A segment with endpoints (2, –1) and (4, 2) is dilated to the image segment with endpoints (4, –2) and (8, 4). What is the scale factor for the dilation?      (Points : 5)
       2

       4

       6

       8 <----my answer